Weyburn: Midale

The Mississippian Midale in southeast Saskatchewan has produced substantial hydrocarbons since the 1950’s.  Since 2012, several companies have utilized multi-stage hydraulic fracturing in lower permeability Midale reservoirs with impressive results. Low production decline rates and existing facilities lead to strong economics, and the play is further boosted by large original oil-in-place (OOIP) volumes as it covers a large geographic area. The reservoirs are dolostones  in the upper “Marly” unit and limestone in the lower “Vuggy” unit. The overlying Midale Evaporite, an extensive evaporitic mud flat/playa lake deposit within the basal Ratcliffe Beds, provides a seal for hydrocarbon accumulation.

In Weyburn, unit operators have used CO2 injection to increase recovery.  There are some drilling opportunities around the fringes of these large units on non-unitized fee land.

Play Synopsis

Province:
Saskatchewan
Formation:
Midale
Average Porosity:
13%
Completion Type:
Open hole
Depth:
1650m to 1750m
Fluid:
Oil, 31 API
Lithology:
Carbonate
Water Saturation:
45%
Type Well EUR:
175 mboe
Type Well IP90:
88 boed
weyburn_midale